1805020416 has 144 divisors (see below), whose sum is σ = 5387329920. Its totient is φ = 596090880.

The previous prime is 1805020403. The next prime is 1805020421. The reversal of 1805020416 is 6140205081.

1805020416 is a `hidden beast` number, since 180 + 50 + 20 + 416 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1805020416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779901 + ... + 782211.

Almost surely, 2^1805020416 is an apocalyptic number.

1805020416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1805020416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2693664960).

1805020416 is an abundant number, since it is smaller than the sum of its proper divisors (3582309504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1805020416 is a wasteful number, since it uses less digits than its factorization.

1805020416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449 (or 2429 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1805020416 is about 42485.5318432052. The cubic root of 1805020416 is about 1217.5702820538.

Adding to 1805020416 its reverse (6140205081), we get a palindrome (7945225497).

The spelling of 1805020416 in words is "one billion, eight hundred five million, twenty thousand, four hundred sixteen".